FR3132605B1 - Audio amplifier - Google Patents

Audio amplifier Download PDF

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Publication number
FR3132605B1
FR3132605B1 FR2200998A FR2200998A FR3132605B1 FR 3132605 B1 FR3132605 B1 FR 3132605B1 FR 2200998 A FR2200998 A FR 2200998A FR 2200998 A FR2200998 A FR 2200998A FR 3132605 B1 FR3132605 B1 FR 3132605B1
Authority
FR
France
Prior art keywords
generator
audio amplifier
load
control
power generator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
FR2200998A
Other languages
French (fr)
Other versions
FR3132605A1 (en
Inventor
Nicholas Peter Sedcole
Alexandre Huffenus
Eduardo Mendes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Devialet SA
Original Assignee
Devialet SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Devialet SA filed Critical Devialet SA
Priority to FR2200998A priority Critical patent/FR3132605B1/en
Priority to EP23154892.6A priority patent/EP4224708A1/en
Publication of FR3132605A1 publication Critical patent/FR3132605A1/en
Application granted granted Critical
Publication of FR3132605B1 publication Critical patent/FR3132605B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H03F3/187—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/432—Two or more amplifiers of different type are coupled in parallel at the input or output, e.g. a class D and a linear amplifier, a class B and a class A amplifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Nonlinear Science (AREA)
  • Networks Using Active Elements (AREA)
  • Amplifiers (AREA)

Abstract

Amplificateur audio Cet amplificateur comporte : - un générateur (18) de référence ; - un générateur (19) de puissance, comportant un générateur (20) dont la sortie est connectée à la sortie du générateur de référence (18), au travers d’une inductance (22) ; et - des moyens (30) de commande du générateur de puissance (19) propres à introduire pour sa commande - un signal () représentatif du produit de la valeur (L(iD)) de l’inductance (22) et de la dérivée par rapport au temps du courant () fourni à la charge (16). Les moyens (30) de commande comportent une boucle de commande ayant une fonction de transfert dépendant de l’impédance complexe (Z(f)) de la charge (16). Figure pour l'abrégé : Figure 1Audio amplifier This amplifier comprises: - a reference generator (18); - a power generator (19), comprising a generator (20) whose output is connected to the output of the reference generator (18), through an inductor (22); and - means (30) for controlling the power generator (19) capable of introducing for its control - a signal () representative of the product of the value (L(iD)) of the inductance (22) and the derivative relative to the time of the current () supplied to the load (16). The control means (30) comprise a control loop having a transfer function depending on the complex impedance (Z(f)) of the load (16). Figure for abstract: Figure 1

FR2200998A 2022-02-04 2022-02-04 Audio amplifier Active FR3132605B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR2200998A FR3132605B1 (en) 2022-02-04 2022-02-04 Audio amplifier
EP23154892.6A EP4224708A1 (en) 2022-02-04 2023-02-03 Audio amplifier

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2200998 2022-02-04
FR2200998A FR3132605B1 (en) 2022-02-04 2022-02-04 Audio amplifier

Publications (2)

Publication Number Publication Date
FR3132605A1 FR3132605A1 (en) 2023-08-11
FR3132605B1 true FR3132605B1 (en) 2024-02-09

Family

ID=82020154

Family Applications (1)

Application Number Title Priority Date Filing Date
FR2200998A Active FR3132605B1 (en) 2022-02-04 2022-02-04 Audio amplifier

Country Status (2)

Country Link
EP (1) EP4224708A1 (en)
FR (1) FR3132605B1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5905407A (en) * 1997-07-30 1999-05-18 Motorola, Inc. High efficiency power amplifier using combined linear and switching techniques with novel feedback system
US6937095B2 (en) 2003-02-19 2005-08-30 Adtran, Inc. Efficient, switched linear signal driver
FR2873872B1 (en) 2004-07-30 2006-10-20 Avise Sarl E AUDIO CLASS AD AMPLIFIER
CN103004083A (en) 2010-03-02 2013-03-27 帝瓦雷公司 Very high fidelity audio amplifier
US8497734B2 (en) * 2010-06-14 2013-07-30 Harman International Industries, Incorporated High efficiency audio amplifier system
FR3023088B1 (en) 2014-06-25 2016-07-22 Devialet AUDIO AMPLIFIER

Also Published As

Publication number Publication date
EP4224708A1 (en) 2023-08-09
FR3132605A1 (en) 2023-08-11

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